How are Javascript array compared? [duplicate]

Question

Is there a standard defined how would JavaScript be compared, on Chrome console I get this

[10,0,0] > [1,0,0]
true
[10,0,0] > [5,0,0]
false
[5, 0, 0, 0] < [10, 0, 0, 0] //repeatable
false

[10,0,0,0] > [9,0,0,0]
false
[11,0,0,0] > [10,0,0,0]
true

Which is highly unintutive, and I can't even make sense what logic is being applied, and they look repeatable so doesn't look based on object id(ref) etc, so is there any documentation for it?

Well, maybe ECMAScript specs will help: ecma-international.org/ecma-262/5.1/#sec-11.8.5 — Stasik
– Stasik, Commented Jun 6, 2013 at 6:49
Is it implicitly calling toString and comparing alphabetically? — Chris Farmer
– Chris Farmer, Commented Jun 6, 2013 at 6:50
This answer on similar question can be useful : stackoverflow.com/a/8329014/2393432 — Ivan Antropov
– Ivan Antropov, Commented Jun 6, 2013 at 6:50
you can see this question stackoverflow.com/questions/7837456/… — pinkpanther
– pinkpanther, Commented Jun 6, 2013 at 6:51
One more thread might help you. stackoverflow.com/questions/7837456/… — Sudeep nayak
– Sudeep nayak, Commented Jun 6, 2013 at 7:01

Stasik · Accepted Answer · 2013-06-06 06:56:18Z

4

JavaScript arrays are converted to strings and the strings are then compared. So.

[10,0,0].toString() => "10,0,0"
[5,0,0].toString() => "5,0,0"

Strings are compared lexicographically, so "5,0,0" is bigger than "10,0,0".

answered Jun 6, 2013 at 6:56

Stasik

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Comments

Indrajit Das · Accepted Answer · 2013-06-06 06:51:35Z

1

Something like this may help you,

JSON.stringify([2,2,2]) === JSON.stringify([2,2,2]); //true

Cheers :).

answered Jun 6, 2013 at 6:51

Indrajit Das

964 bronze badges

2 Comments

Chris Farmer Over a year ago

Why would this help him?

Indrajit Das Over a year ago

By this we can straight away compare two array as String.

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